Distribution: overall distribution not corrected for removal of zweifeli and oligolepis.

Subspecies: Erythrolamprus reginae zweifeli (ROZE 1959) has been elevated to full species status.

Liophis zweifeli differs from L. reginae (meristic and colour characters taken from Dixon 1983a) in having a salt-and-pepper dorsal pattern (vs dorsum with dense pale and dark paravertebral flecking in L. reginae) and in having a higher number of subcaudal scales (69−88 vs 55−78 in L. r. reginae).